Monday, April 21, 2008

Electromagnetic Interference

The space is overcrowded with EM signals and the radar receives them and very often can not distiguish them from other weather signals, so displays them. The radar image (right) shows some radial echoes detected by the Bucharest C-band radar . They are generated by the electromagnetic interference with some other antennas at south of the radar site. How do we know that they are not clouds besides this "artificial" radial aspect? Because in the satellite image (IR) (left), we do not see similar structures. The only meteo feature is the line of clouds oriented W-E over Bulgaria. The other echoes around the radar sites in Timisoara (western Romania) and Medgidia (south-eastern Romania) are ground clutter around S-band sites. Images are from the NMA site, Sunday morning.